import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class JDBCSelect {
    public static void main(String[] args) throws SQLException {
        //创建并初始化数据源
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource)dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/java107?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("111111");

        // 2.和数据库建立连接
        Connection connection = dataSource.getConnection();

        // 3.构造sql语句
        String sql = "select * from student";
        PreparedStatement statement = connection.prepareStatement(sql);

        // 4.执行sql语句
        ResultSet resultSet = statement.executeQuery();

        // 5.遍历结果集合
        while(resultSet.next()) {   //迭代风格
            int id = resultSet.getInt("id");
            String name = resultSet.getString("name");
            System.out.println("id: " + id + " name: " + name);

        }

        // 6.释放资源
        resultSet.close();
        statement.close();
        connection.close();
    }
}

